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Solder Alloy 704 vs. C87900 Brass

Solder alloy 704 belongs to the otherwise unclassified metals classification, while C87900 brass belongs to the copper alloys. There are 22 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is solder alloy 704 and the bottom bar is C87900 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 51
110
Elongation at Break, % 30
25
Poisson's Ratio 0.36
0.31
Shear Modulus, GPa 19
41
Tensile Strength: Ultimate (UTS), MPa 55
480

Thermal Properties

Latent Heat of Fusion, J/g 62
190
Melting Completion (Liquidus), °C 240
930
Melting Onset (Solidus), °C 220
900
Specific Heat Capacity, J/kg-K 220
390
Thermal Conductivity, W/m-K 50
120
Thermal Expansion, µm/m-K 22
20

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 13
15
Electrical Conductivity: Equal Weight (Specific), % IACS 15
17

Otherwise Unclassified Properties

Density, g/cm3 7.5
8.1
Embodied Carbon, kg CO2/kg material 19
2.7
Embodied Energy, MJ/kg 320
46

Common Calculations

Stiffness to Weight: Axial, points 3.8
7.3
Stiffness to Weight: Bending, points 17
20
Strength to Weight: Axial, points 2.1
17
Strength to Weight: Bending, points 4.3
17
Thermal Diffusivity, mm2/s 30
37
Thermal Shock Resistance, points 3.5
16

Alloy Composition

Aluminum (Al), % 0 to 0.0010
0 to 0.15
Antimony (Sb), % 0 to 0.1
0 to 0.050
Arsenic (As), % 0 to 0.030
0 to 0.050
Bismuth (Bi), % 0 to 0.1
0
Cadmium (Cd), % 0 to 0.0020
0
Copper (Cu), % 0 to 0.050
63 to 69.2
Gold (Au), % 0 to 0.050
0
Indium (In), % 0 to 0.1
0
Iron (Fe), % 0 to 0.020
0 to 0.4
Lead (Pb), % 0 to 0.070
0 to 0.25
Manganese (Mn), % 0
0 to 0.15
Nickel (Ni), % 0 to 0.010
0 to 0.5
Phosphorus (P), % 0
0 to 0.010
Silicon (Si), % 0
0.8 to 1.2
Silver (Ag), % 4.8 to 5.2
0
Sulfur (S), % 0
0 to 0.050
Tin (Sn), % 94.3 to 95.2
0 to 0.25
Zinc (Zn), % 0 to 0.0010
30 to 36